<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		.s1{
			background-color: red;
			margin-right: 30px;
		}
		.s2{
			background-color:rgb(0,128,0);
			margin-left: 30px;
		}
	</style>
</head>
<body>
	<span class="s1">alex</span><span class="s2">wusir</span>
	
</body>
</html>